/*****************************************************************************
*                                                                            *
*  OpenNI 1.x Alpha                                                          *
*  Copyright (C) 2012 PrimeSense Ltd.                                        *
*                                                                            *
*  This file is part of OpenNI.                                              *
*                                                                            *
*  Licensed under the Apache License, Version 2.0 (the "License");           *
*  you may not use this file except in compliance with the License.          *
*  You may obtain a copy of the License at                                   *
*                                                                            *
*      http://www.apache.org/licenses/LICENSE-2.0                            *
*                                                                            *
*  Unless required by applicable law or agreed to in writing, software       *
*  distributed under the License is distributed on an "AS IS" BASIS,         *
*  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  *
*  See the License for the specific language governing permissions and       *
*  limitations under the License.                                            *
*                                                                            *
*****************************************************************************/
//---------------------------------------------------------------------------
// Includes
//---------------------------------------------------------------------------
#include <XnUSB.h>

//---------------------------------------------------------------------------
// Global Variables
//---------------------------------------------------------------------------
XnBool g_bUSBWasInit = FALSE;

//---------------------------------------------------------------------------
// Function Declaration
//---------------------------------------------------------------------------
XnStatus xnUSBPlatformSpecificInit();
XnStatus xnUSBPlatformSpecificShutdown();

//---------------------------------------------------------------------------
// Code
//---------------------------------------------------------------------------

XN_C_API XnStatus xnUSBInit()
{
	XnStatus nRetVal = XN_STATUS_OK;

	if (g_bUSBWasInit == FALSE)
	{
		nRetVal = xnUSBPlatformSpecificInit();
		XN_IS_STATUS_OK(nRetVal);

		g_bUSBWasInit = TRUE;
	}
	else
	{
		return (XN_STATUS_USB_ALREADY_INIT);
	}

	return (XN_STATUS_OK);
}

XN_C_API XnStatus xnUSBShutdown()
{
	XnStatus nRetVal = XN_STATUS_OK;

	if (g_bUSBWasInit == TRUE)
	{
		nRetVal = xnUSBPlatformSpecificShutdown();
		XN_IS_STATUS_OK(nRetVal);

		g_bUSBWasInit = FALSE;
	}
	else
	{
		return (XN_STATUS_USB_NOT_INIT);
	}

	return (XN_STATUS_OK);
}
